Mazda 2006 MX-5 Service Highlights page 291

TRIPLE SYNCHRONIZER MECHANISM OPERATION [P66M-D]
1. When the hub sleeve moves to the left (in the
direction of the arrow), the synchronizer key
presses against the synchronizer ring.
2. As the hub sleeve continues moving to the left,
the key causes friction between the synchronizer
ring, double cone, and inner cone. The
synchronizer ring turns only the distance that the
key groove gap allows, aligning the teeth of the
hub sleeve and the synchronizer ring. As the hub
sleeve continues moving, the friction between the
cones becomes greater, and the difference
between the rotational speeds of the synchronizer
ring, inner cone, and double cone (unified with the
gear) gradually disappears.
3. The hub sleeve then moves up onto the
synchronizer key and engages the synchronizer
ring.
4. The hub sleeve then engages the synchro teeth
of the gear to complete shifting.
End Of Sie
MANUAL TRANSMISSION [P66M-D]
SYNCHRONIZER
RING
DOUBLE CONE
INNER CONE
SYNCHRONIZER RING
SYNCHRONIZER KEY
KEY GROOVE
SYNCHRONIZER RING
CLUTCH HUB SLEEVE
SYNCHRO TEETH
E5U051100000N06
CLUTCH HUB SLEEVE
SYNCHRONIZER
KEY
E5U511BS5010
05–11B
E5U511BS5011
E5U511BS5012
E5U511BS5013
05–11B–5